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Vol 17 Iss. 18
Pages:
97-99
Download volume:
RUS
Article
Geology

On the age of the Surakian and Inoceramian stages

Authors:
V. I. Bodylevskii
Date submitted:
1948-07-08
Date accepted:
1948-09-13
Date published:
1948-07-14

Abstract

Chekanovsky, during his trip to the Olenek in 1875, established for the Mesozoic deposits developed along the Olenek and Lena two divisions, which he named: the lower (dark clayey shales with Inoceramus retrorsus) — the Surak stage, and the upper (light gray sandstones with I. retrorsus and aucellae) — the Inoceramian stage. The first mention of this is in the article by Lagusen, who described the fauna of these deposits and came to the conclusion that in age they can be compared with the Volgian stages, and the Inoceramian stage is apparently even younger than the upper Volgian stage. Later, D. N. Sokolov, in connection with the question of the age of I. retrorsus, recognized that the Surak stage corresponds to the upper part of the upper Volgian stage or the Berriasian; but he was inclined to consider the Inoceramian stage to be merely a facies change of the Surak stage, differing from it in the co‑occurrence of inoceramids and aucellae, or even in the predominance of the latter. The idea of the position of both Chekanovskii’s stages at the Jurassic‑Cretaceous boundary or at the very bottom of the Lower Cretaceous was accepted by all subsequent authors and transferred to summary works on the geology of Siberia.

Область исследования:
Geology
Funding:

None

Go to volume 17

References

  1. I. Lahusen, Mem. Acad. Imp. d. Sc. d. St. Petersb., VII Ser. XXXIII, No. 7, 1886.
  2. D. N. Sokolov, Proceedings Trudy of the Geol. Museya im. Petra Velikogo Ak. Nauk ogical Museum named after Peter the Great. Academy of Sciences, VI, No. 6, 1912. (in Russian)
  3. Stratigraphic Dictionary of the USSR, 1937. (in Russian)
  4. I. Lahusen, Proceedings of the Geological Committee, VIII, No. 1, 1888. (in Russian)
  5. V. Bodylevskii and L. Kiparisova, Proceedings of the Trudy XVII sessii on of the Mezhd. Int. Geol.ogical Kongressa, V, 1940. (in Russian)
  6. V. Bodylevskii, Problems of the Arctic, 1939, No. 10-11. (in Russian)
  7. D. N. Sokolov, Proceedings Trudy of the Geol.ogical Museya im. Petra Velikogo Ak. Nauk um named after Peter the Great. Academy of Sciences, IV, No. 3, 1910. (in Russian)
  8. L. F. Spath, Meddel Iser om Groenland, 87, No. 7, 1932.

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